package main

import (
	"fmt"
	"unsafe"
)

func main() {

	// var num int8 = 200
	// fmt.Println(num)

	// var num2 uint8 = 20
	// fmt.Println(num2)

	var num3 = 20
	fmt.Printf("num3类型: %T", num3)
	fmt.Println()
	fmt.Println(unsafe.Sizeof(num3))
}